<html xmlns="http://www.w3.org/1999/xhtml">
 <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<head runat="server">
 
    <title>窗口大小</title>
 
</head>
 
<body>
 
<h2 align="center">请调整浏览器窗口大小</h2>
 
<hr/>
 
<form action="#"method="get"name="form1"id="form1">
 
<!--显示浏览器窗口的实际尺寸-->
 
浏览器窗口的高度：<input type="text"name="availHeight"size="4"/><br/>
 
浏览器窗口的宽度：<input type="text"name="availWidth"size="4"/><br/>
 
</form>
 
<div id="div1"style="background-color:Gray; width:616px; height: 305px;"></div>
 
  
 
<script type="text/javascript">
 
    var winWidth=0;
 
    var winHeight=0;
 
    function findDimensions() { //函数：获取尺寸
 
        //获取窗口宽度
 
        if (window.innerWidth) {
 
            winWidth = window.innerWidth;
 
        }
 
        elseif ((document.body) && (document.body.clientWidth)) {
 
            winWidth = document.body.clientWidth;
 
        }
 
         
 
        //获取窗口高度
 
        if (window.innerHeight) {
 
            winHeight = window.innerHeight;
 
        }
 
        elseif ((document.body) && (document.body.clientHeight)) {
 
            winHeight = document.body.clientHeight;
 
        }
 
  
 
        //通过深入Document内部对body进行检测，获取窗口大小
 
        if (document.documentElement && document.documentElement.clientHeight && document.documentElement.clientWidth) {
 
            winHeight=document.documentElement.clientHeight;
 
            winWidth=document.documentElement.clientWidth;
 
        }
 
  
 
        //结果输出至两个文本框
 
        document.form1.availHeight.value=winHeight;
 
        document.form1.availWidth.value = winWidth;
 
  
 
        //设置div的具体宽度=窗口的宽度的%
 
        if (document.getElementById("div1")) {
 
            document.getElementById("div1").style.width = winWidth*0.98 + "px";
 
        }
 
    }
 
    findDimensions();
 
    window.onresize=findDimensions;
 
</script>
 
</body>
</html>